I am a credentialed mental health professional and, in my opinion, Donald Trump is diagnosable as someone with narcissistic personality disorder (NPD), a mental condition recognized by the American Psychiatric Association. But you do not have to be a professional mental health practitioner to come to this conclusion.
If you google “personality disorders” and visit a reputable site, such as the Mayo Clinic, you will find information about NPD and other personality disorders, which are conditions that can seriously limit one’s ability to function. Keep Donald Trump’s characteristics and behaviors in mind as you read through the diagnostic criteria that define NPD, and you will readily see that he clearly and consistently exhibits all the classic symptoms. These include: behaving in an arrogant or haughty manner; exaggerating your achievements and talents; requiring constant admiration; having a sense of entitlement; expecting to be recognized as superior, even without achievements that warrant it; taking advantage of others to get what you want; having an exaggerated sense of self-importance; expecting special favors and unquestioning compliance with your expectations; and having an inability or unwillingness to recognize the needs and feelings of others.
The trend in recent years has been toward community-based treatment and away from institutionalizing individuals with mental disorders. However, Mr. Trump is the president, and any impairment in his capacity to exercise good judgement arising from his mental state could have extremely negative consequences for everyone on this planet. Therefore, his mental competence is a grave concern.
In 2016, one of the incessant chants at Donald Trump rallies — which he encouraged — was “Lock her up. Lock her up.” It has been said that turnabout is fair play. Therefore, perhaps the new chant for 2017 might be, “Lock him up. Lock him up.”